US Bridges

Kam HWY over Kahawainui Strm-Laiewai

Poor

Honolulu County, Hawaii · 0.17MI Nw/Naniloa Lp · Structure no. 003000830301785

Built
1933
92 years old
Condition
Poor
inspected July 2024
Type
Slab
Concrete Continuous
Length
91 ft
5 main spans
Daily traffic
13,700
2017 count
Owner
State
State Highway Agency

About this bridge

Kam HWY over Kahawainui Strm-Laiewai is a concrete continuous slab carrying Kam HWY over Kahawainui Strm-Laiewai in Honolulu County, Hawaii. It was built in 1933, so it is 92 years old, older than the Hawaii average of 63.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 3 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

It carries about 13,700 vehicles a day, roughly 5% of them trucks, projected to reach 12,725 by 2025. The structure is 91 ft (27.7 m) long and 27 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesKam HWY
CrossesKahawainui Strm-Laiewai
Location0.17MI Nw/Naniloa Lp
RouteU.S. Route 83
StateHawaii
Coordinates21.654, -157.92991
Functional classUrban Other Principal Arterial

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure3 SeriousLoss of section, deterioration, spalling or scour have seriously affected primary structural components.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation3: Basically intolerable, requiring high priority of corrective action
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy3: Basically intolerable, requiring high priority of corrective action
Approach roadway alignment5: Somewhat better than minimum adequacy to tolerate being left in place as is
Operating rating41.8 US tons
Inventory rating32.2 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans5
Design loadH 15
Structure length91 ft (27.7 m)
Longest span18 ft (5.5 m)
Deck width27 ft (8.3 m)
Roadway width24 ft (7.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic13,700 (2017)
Projected traffic12,725 by 2025
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkNon-Interstate STRAHNET route

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedOther structural work, including hydraulic replacements
Estimated improvement cost$445,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Kam HWY over Kahawainui Strm-Laiewai built?

It was built in 1933, making it 92 years old in 2025.

What condition is Kam HWY over Kahawainui Strm-Laiewai in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in July 2024.

How much traffic does Kam HWY over Kahawainui Strm-Laiewai carry?

About 13,700 vehicles per day (2017 count), of which roughly 5% are trucks.

How long is Kam HWY over Kahawainui Strm-Laiewai?

The structure is 91 ft (27.7 m) long with a longest span of 18 ft (5.5 m) and a deck 27 ft wide.

Who owns Kam HWY over Kahawainui Strm-Laiewai?

It is owned by the State Highway Agency.